Here I am, rolling in years after the fact, to dig this thread up and ask: Where's the 15th member of Tahomen's expedition? I keep finding 14 on my read-throughs. I feel like it must be staring me in the face.
From the smugglers, the PCs can learn that the expedition consists of 15 people: 11 lashuntas, 2 humans, 1 kasatha, and 1 shirren.
The kasatha is Dr. Solstarni, and the shirren is Salask. Done and done, set them aside.
Unidentified Corpses: 1. One killed by the vracinea. 2. One killed by the ksariks at the Stargazer. 3. One killed by a dart trap/mountain eel combo at the Temple of the Twelve.
Since no human cultists turn up in combat encounters, safe to assume they both go in the "unidentified corpses" pile, along with 1 lashunta. That just leaves the lashuntas.
Surviving Lashuntas (10): 1. Tahomen. 2. Avissa. 3. Ralkawi. 4-5. Two cultists accompanying Salask at the Stargazer. 6-7. Two cultists accompanying Avissa at the Temple. 8-9. Two cultists accompanying Tahomen. 10. ? Who am I missing?
A bit late to the party here, as Im just getting into SF, but on pg 62-63 of the AP compilation book, Ralkawi is described as succumbing to the effects of the Ksarik's carrion spores on/about day 5 of the jungle trek. Assuming the PCs don't provide her any care.